HADOOP-18446. [SBN read] Add a re-queue metric to RpcMetrics to quantify the number of re-queued RPCs #4871

ZanderXu · 2022-09-08T01:28:22Z

Description of PR

Add a reQueue metric to RpcMetrics.java to quantify the number of RPCs reQueued. Because Observer NameNode will re-queue the rpc if the call processing should be postponed.
There is no any metric to quantify the number of re-queue RPCs, so I think we should do it.

…e number of re-queue RPCs

hadoop-yetus · 2022-09-08T12:12:57Z

🎊 +1 overall

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ZanderXu · 2022-09-11T01:06:32Z

@ayushtkn @xkrogen Sir, can you help me review this patch? This metric is used to quantify the number of RPCs reQueued in Observer NameNode,

xkrogen

Nice change! Small comments on the test impl but generally supportive. I am surprised we didn't add this with the original impl of requeueCall().

...s-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSNamesystem.java

...ct/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/ha/TestObserverNode.java

hadoop-yetus · 2022-09-13T15:01:11Z

🎊 +1 overall

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xkrogen

Very minor comments now.

This checkstyle I think we can ignore; all of the metrics in RpcMetrics are set up this way:

./hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/ipc/metrics/RpcMetrics.java:132:  MutableCounterLong rpcRequeueCalls;:22: Variable 'rpcRequeueCalls' must be private and have accessor methods. [VisibilityModifier]

...ct/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/ha/TestObserverNode.java

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/ipc/metrics/RpcMetrics.java

hadoop-yetus · 2022-09-15T12:50:25Z

💔 -1 overall

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hadoop-yetus · 2022-09-16T02:50:42Z

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		641m 50s

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Failed junit tests	hadoop.http.TestHttpServer
	hadoop.hdfs.server.namenode.ha.TestObserverNode
	hadoop.hdfs.server.mover.TestMover

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xkrogen · 2022-09-16T17:07:33Z

The failing test in TestHttpServer was just added 2 days ago in PR #3972 and has been failing consistently since it was added (see this comment). So we can ignore that failure.

Merging to master, thanks for the contribution @ZanderXu !

…ify the number of re-queued RPCs (apache#4871) Signed-off-by: Erik Krogen <xkrogen@apache.org> Co-authored-by: zengqiang.xu <zengqiang.xu@shopee.com>

HADOOP-18446. Add a re-queue metric to RpcMetrics.java to quantify th…

224a945

…e number of re-queue RPCs

slfan1989 approved these changes Sep 8, 2022

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xkrogen requested changes Sep 12, 2022

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HADOOP-18446. Modify this patch based on comments

bd38b8c

xkrogen requested changes Sep 14, 2022

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...ct/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/ha/TestObserverNode.java Outdated Show resolved Hide resolved

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/ipc/metrics/RpcMetrics.java Outdated Show resolved Hide resolved

HADOOP-18446. Modify code based on the comments

ce42970

xkrogen approved these changes Sep 15, 2022

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xkrogen changed the title ~~HADOOP-18446. Add a re-queue metric to RpcMetrics.java to quantify the number of re-queue RPCs~~ HADOOP-18446. [SBN read] Add a re-queue metric to RpcMetrics to quantify the number of re-queued RPCs Sep 16, 2022

xkrogen merged commit a73c480 into apache:trunk Sep 16, 2022

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HADOOP-18446. [SBN read] Add a re-queue metric to RpcMetrics to quantify the number of re-queued RPCs #4871

HADOOP-18446. [SBN read] Add a re-queue metric to RpcMetrics to quantify the number of re-queued RPCs #4871

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HADOOP-18446. [SBN read] Add a re-queue metric to RpcMetrics to quantify the number of re-queued RPCs #4871

HADOOP-18446. [SBN read] Add a re-queue metric to RpcMetrics to quantify the number of re-queued RPCs #4871

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ZanderXu commented Sep 8, 2022

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